Removal of Cd ions by sol-gel silica doped with 1-(2-pyridylazo)-2-naphthol
1-(2-Pyridylazo)-2-Naphthol (PAN) doped sol-gel silica has been investigated for removal of metal ions from aqueous media. In the doped sol-gel silica, the large reagent molecules are entrapped inside the pores while small metal ions can diffuse into the pores where they are complexed by the reagent...
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| Veröffentlicht in: | Journal of sol-gel science and technology 2003-06, Vol.27 (2), p.221-224 |
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| container_title | Journal of sol-gel science and technology |
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| creator | KHAN, Aslam MAHMOOD, Farzana AHMED, Shujaat YOUNAS KHOKHAR, M |
| description | 1-(2-Pyridylazo)-2-Naphthol (PAN) doped sol-gel silica has been investigated for removal of metal ions from aqueous media. In the doped sol-gel silica, the large reagent molecules are entrapped inside the pores while small metal ions can diffuse into the pores where they are complexed by the reagent and retained inside the pores. This new solid sorbent was applied for removal of Cd(II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and pH effect on the removal were studied to optimize the conditions to be utilized on a large scale. It was observed that a sol gel loaded with 0.09 mmol PAN/g, had a capacity of 0.044 mmol Cd/g. The desorption of metal ions was carried by 1 M HCl and the sol-gel silica sorbent could be regenerated and reused repeatedly. |
| doi_str_mv | 10.1023/A:1023762920505 |
| format | Article |
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In the doped sol-gel silica, the large reagent molecules are entrapped inside the pores while small metal ions can diffuse into the pores where they are complexed by the reagent and retained inside the pores. This new solid sorbent was applied for removal of Cd(II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and pH effect on the removal were studied to optimize the conditions to be utilized on a large scale. It was observed that a sol gel loaded with 0.09 mmol PAN/g, had a capacity of 0.044 mmol Cd/g. The desorption of metal ions was carried by 1 M HCl and the sol-gel silica sorbent could be regenerated and reused repeatedly.</description><identifier>ISSN: 0928-0707</identifier><identifier>EISSN: 1573-4846</identifier><identifier>DOI: 10.1023/A:1023762920505</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Adsorbents ; Aqueous solutions ; Chemistry ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Exact sciences and technology ; General and physical chemistry ; Metal ions ; Naphthol ; Porosity ; Pyridylazonaphthol ; Reagents ; Silica gel ; Silicon dioxide ; Sol-gel processes ; Sorbents ; Surface physical chemistry</subject><ispartof>Journal of sol-gel science and technology, 2003-06, Vol.27 (2), p.221-224</ispartof><rights>2003 INIST-CNRS</rights><rights>Journal of Sol-Gel Science and Technology is a copyright of Springer, (2003). 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Colloidal sols</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Metal ions</subject><subject>Naphthol</subject><subject>Porosity</subject><subject>Pyridylazonaphthol</subject><subject>Reagents</subject><subject>Silica gel</subject><subject>Silicon dioxide</subject><subject>Sol-gel processes</subject><subject>Sorbents</subject><subject>Surface physical chemistry</subject><issn>0928-0707</issn><issn>1573-4846</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNotjUtLw0AYRQdRsFbXbgdE0MXoPDMZd6X4woIgug5f5mFTppmYSSvx11uxqwOXw7kInTN6wygXt7O7P-iCG04VVQdowpQWRJayOEQTanhJqKb6GJ3kvKKUKsn0BL28-XXaQsQp4LnDTWozrkecUySfPuLcxMYCdqnzDn83wxIzcsVJN_aNGyP8pGvCSQvdclimeIqOAsTsz_acoo-H-_f5E1m8Pj7PZwtiudIDMQq8YMACtcEFGVxd24LLYAOognkwQhgugtTOBM8U43XNd5swEpwRlIkpuvjvdn362vg8VKu06dvdZcW5MkpJzsqddbm3IFuIoYfWNrnq-mYN_VgxWRalpFL8AqvQWmo</recordid><startdate>20030601</startdate><enddate>20030601</enddate><creator>KHAN, Aslam</creator><creator>MAHMOOD, Farzana</creator><creator>AHMED, Shujaat</creator><creator>YOUNAS KHOKHAR, M</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20030601</creationdate><title>Removal of Cd ions by sol-gel silica doped with 1-(2-pyridylazo)-2-naphthol</title><author>KHAN, Aslam ; MAHMOOD, Farzana ; AHMED, Shujaat ; YOUNAS KHOKHAR, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c257t-95ae31a1f0cfdf4fdbbc624fcfa561ea933923f47d9fe1512bb2933394ad93013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Adsorbents</topic><topic>Aqueous solutions</topic><topic>Chemistry</topic><topic>Colloidal gels. 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In the doped sol-gel silica, the large reagent molecules are entrapped inside the pores while small metal ions can diffuse into the pores where they are complexed by the reagent and retained inside the pores. This new solid sorbent was applied for removal of Cd(II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and pH effect on the removal were studied to optimize the conditions to be utilized on a large scale. It was observed that a sol gel loaded with 0.09 mmol PAN/g, had a capacity of 0.044 mmol Cd/g. The desorption of metal ions was carried by 1 M HCl and the sol-gel silica sorbent could be regenerated and reused repeatedly.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1023/A:1023762920505</doi><tpages>4</tpages></addata></record> |
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| ispartof | Journal of sol-gel science and technology, 2003-06, Vol.27 (2), p.221-224 |
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| language | eng |
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| subjects | Adsorbents Aqueous solutions Chemistry Colloidal gels. Colloidal sols Colloidal state and disperse state Exact sciences and technology General and physical chemistry Metal ions Naphthol Porosity Pyridylazonaphthol Reagents Silica gel Silicon dioxide Sol-gel processes Sorbents Surface physical chemistry |
| title | Removal of Cd ions by sol-gel silica doped with 1-(2-pyridylazo)-2-naphthol |
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